Disc reproducing method and apparatus with multiple heads
US5488593A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1993 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Dec 10, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc reproducing apparatus for reproducing data stored on plural disc surfaces at a constant linear density comprises: plural heads for reproducing the data on the plural disc surfaces at the same time respectively; a controller for controlling positions of the heads such that a total data rate of data reproduced form the plural heads is constant, each of the disc surfaces being divided into N circumference zones; N signal processing circuits, having N processing speeds corresponding to N data rates corresponding to the N circumference zones, for processing the reproduced data respectively; a switch for supplying the reproduced data to the N signal processing circuits such that data reproduced by each of the plural heads is supplied to any of the N signal processing circuits suitable for the data rate of the supplied data thereto; and a combining circuit for combining the processed data signals from the N signal processing circuits into a combined serial data signal of which data rate corresponds to the total of data rates. A disc reproducing method of reproducing data stored on a plurality of disc surfaces at a constant linear density using N signal processing circuits and the s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.